HydroBASINS lev08 watershed · #7080882860
Bassin de Río San Juan
A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.
Crosses 2 administrative regions across 2 countries : Los Chiles, San Carlos
Sub-basin area
56,7km²
Upstream area
31 286,6km²
Discharge
429,65m³/s
Mean elev.
55m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Río San Juan946 km²
- Bassin de Río Sábalos449 km²
2 dept-equivalent regions (GADM L2)
- 54.1 km²95.8% of basin
- Los ChilesAlajuela · Costa Rica2.4 km²4.2% of basin
3 intersecting protected areas
Reserva de Biosfera Río San Juan Nicaragua
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
54.03 km² overlap
Corredor Fronterizo
IUCN VINational Wildlife Refuge
2.41 km² overlap
Agua y Paz
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
2.24 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
225 distinct species · 382 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 29 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Río San Juan : 22 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 42 interactions GloBI sur 4 types (connectance 9.7%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
25,7°C
Annual rain
2 897mm
Moisture idx (CMI)
0,46
Runoff
1 399mm/an
PET
1 565mm
AET
1 419mm
Mean slope
1,6°
Water table
70cm
Forest
100%
Crops
4%
Urban
1%
Protected
100%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)